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Title: Maximum discharge rate of liquid-vapor mixtures from vessels

Abstract

A discrepancy exists in theoretical predictions of the two-phase equilibrium discharge rate from pipes attached to vessels. Theory which predicts critical flow data in terms of pipe exit pressure and quality severely overpredicts flow rates in terms of vessel fluid properties. This study shows that the discrepancy is explained by the flow pattern. Due to decompression and flashing as fluid accelerates into the pipe entrance, the maximum discharge rate from a vessel is limited by choking of a homogeneous bubbly mixture. The mixture tends toward a slip flow pattern as it travels through the pipe, finally reaching a different choked condition at the pipe exit.

Authors:
Publication Date:
Research Org.:
General Electric Co., San Jose, CA (United States). BWR Projects Dept.
OSTI Identifier:
7309475
Report Number(s):
NEDO-21052
TRN: 77-014497
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; BLOWDOWN; BWR TYPE REACTORS; FLOW RATE; MATHEMATICAL MODELS; PIPES; PRESSURE VESSELS; RUPTURES; TWO-PHASE FLOW; CONTAINERS; FAILURES; FLUID FLOW; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220900* - Nuclear Reactor Technology- Reactor Safety; 210100 - Power Reactors, Nonbreeding, Light-Water Moderated, Boiling Water Cooled

Citation Formats

Moody, Frederick J. Maximum discharge rate of liquid-vapor mixtures from vessels. United States: N. p., 1975. Web. doi:10.2172/7309475.
Moody, Frederick J. Maximum discharge rate of liquid-vapor mixtures from vessels. United States. https://doi.org/10.2172/7309475
Moody, Frederick J. 1975. "Maximum discharge rate of liquid-vapor mixtures from vessels". United States. https://doi.org/10.2172/7309475. https://www.osti.gov/servlets/purl/7309475.
@article{osti_7309475,
title = {Maximum discharge rate of liquid-vapor mixtures from vessels},
author = {Moody, Frederick J.},
abstractNote = {A discrepancy exists in theoretical predictions of the two-phase equilibrium discharge rate from pipes attached to vessels. Theory which predicts critical flow data in terms of pipe exit pressure and quality severely overpredicts flow rates in terms of vessel fluid properties. This study shows that the discrepancy is explained by the flow pattern. Due to decompression and flashing as fluid accelerates into the pipe entrance, the maximum discharge rate from a vessel is limited by choking of a homogeneous bubbly mixture. The mixture tends toward a slip flow pattern as it travels through the pipe, finally reaching a different choked condition at the pipe exit.},
doi = {10.2172/7309475},
url = {https://www.osti.gov/biblio/7309475}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 1975},
month = {Mon Sep 01 00:00:00 EDT 1975}
}